The journal On The Horizon - The Strategic Planning Resource for Education Professionals (Volume 13 Number 2 2005) has an entire issue dedicated to the uses of games, blogs, and other technology in the classroom. You can access the table of contents and paper abstracts, but full papers are available only to subscribers. The issue includes articles from several usual suspects, such as Jill Walker, Mia Consalvo, Michael Mateas, and Ian Bogost.
Too bad full-text isn't available online. I'll have to buzz by LoC for photocopies.
update: Looking through the archives, it looks like they had a previous special Issue: Second generation e-learning: serious games
(Volume 12, Number 1, January 2004)